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Nirmalraj P, Thompson D, Dimitrakopoulos C, et al. A robust molecular probe for Ångstrom-scale analytics in liquids. Nat Commun. 2016;7:12403doi: 10.1038/ncomms12403.
Nirmalraj, P., Thompson, D., Dimitrakopoulos, C., Gotsmann, B., Dumcenco, D., Kis, A., & Riel, H. (2016). A robust molecular probe for Ångstrom-scale analytics in liquids. Nature communications, 712403. https://doi.org/10.1038/ncomms12403
Nirmalraj, Peter, et al. "A robust molecular probe for Ångstrom-scale analytics in liquids." Nature communications vol. 7 (2016): 12403. doi: https://doi.org/10.1038/ncomms12403
Nirmalraj P, Thompson D, Dimitrakopoulos C, Gotsmann B, Dumcenco D, Kis A, Riel H. A robust molecular probe for Ångstrom-scale analytics in liquids. Nat Commun. 2016 Aug 12;7:12403. doi: 10.1038/ncomms12403. PMID: 27516157; PMCID: PMC4990633.
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Nat Commun. 2016 Aug 12;7:12403. doi: 10.1038/ncomms12403.

A robust molecular probe for Ångstrom-scale analytics in liquids.

Nature communications

Peter Nirmalraj, Damien Thompson, Christos Dimitrakopoulos, Bernd Gotsmann, Dumitru Dumcenco, Andras Kis, Heike Riel

Affiliations

  1. IBM Research-Zürich, Säumerstrasse 4, CH- 8803 Rüschlikon, Switzerland.
  2. Department of Physics and Energy, University of Limerick, Limerick V94 T9PX, Ireland.
  3. Materials and Surface Science Institute, University of Limerick, Limerick V94 T9PX, Ireland.
  4. Department of Chemical Engineering, University of Massachusetts, Amherst, Massachusetts 01003-3110, USA.
  5. Electrical Engineering Institute, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.
  6. Institute of Materials Science and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.

PMID: 27516157 PMCID: PMC4990633 DOI: 10.1038/ncomms12403

Abstract

Traditionally, nanomaterial profiling using a single-molecule-terminated scanning probe is performed at the vacuum-solid interface often at a few Kelvin, but is not a notion immediately associated with liquid-solid interface at room temperature. Here, using a scanning tunnelling probe functionalized with a single C60 molecule stabilized in a high-density liquid, we resolve low-dimensional surface defects, atomic interfaces and capture Ångstrom-level bond-length variations in single-layer graphene and MoS2. Atom-by-atom controllable imaging contrast is demonstrated at room temperature and the electronic structure of the C60-metal probe complex within the encompassing liquid molecules is clarified using density functional theory. Our findings demonstrates that operating a robust single-molecular probe is not restricted to ultra-high vacuum and cryogenic settings. Hence the scope of high-precision analytics can be extended towards resolving sub-molecular features of organic elements and gauging ambient compatibility of emerging layered materials with atomic-scale sensitivity under experimentally less stringent conditions.

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